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Description: Description: Recent studies on Mathematical modeling of visual cortical cells [Kulikowski/Marcelja/Bishop:1982] suggest a tuned band pass filter bank structure. These filters are found to have Gaussian transfer functions in the frequency domain. Thus, taking the Inverse Fourier Transform of this transfer function we get a filter characteristics closely resembling to the Gabor filters. The Gabor filter is basically a Gaussian (with variances sx and sy along x and y-axes respectively) modulated by a complex sinusoid (with centre frequencies U and V along x and y-axes respectively).
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Author: gz |
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Description: 滤波是信号处理的一种最基本而重要的技术，利用滤波可从复杂的信号中提取所需要的信号，抑制不需要的部分-signal processing filter is a basic and important technology, Filtering can use the signal from the complex by the need to extract the signal, not part of inhibition
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Description: Description: Recent studies on Mathematical modeling of visual cortical cells [Kulikowski/Marcelja/Bishop:1982] suggest a tuned band pass filter bank structure. These filters are found to have Gaussian transfer functions in the frequency domain. Thus, taking the Inverse Fourier Transform of this transfer function we get a filter characteristics closely resembling to the Gabor filters. The Gabor filter is basically a Gaussian (with variances sx and sy along x and y-axes respectively) modulated by a complex sinusoid (with centre frequencies U and V along x and y-axes respectively).
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Author: gz |
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Description: 看过一篇<<HTML代码过滤技术>>，只有DELPHI源码，可是没有VC源码，今将DELPHI源码改为VC源码，以供对代码过滤技术有兴趣的朋友一起分享。此代码只是简单的例子，在复杂的应用中可能会有问题，希望大家多多交流。
-Read a <<HTML代码过滤技术>>, only DELPHI source, but there is no VC source, this will be replaced by DELPHI source VC source for the code filtering technology are interested in sharing with friends. This code is a simple example, in complex applications may have problems, a lot of hope that we exchange.
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Description: haar复小波的matlab实现源代码，适合学习滤波的人学习-haar Complex Wavelet achieve the Matlab source code suitable for the study of learning filter
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Author: 王力 |
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Description: 滤波是信号处理的一种最基本而重要的技术，利用滤波可从复杂的信号中提取所需要的信号，抑制不需要的部分-signal processing filter is a basic and important technology, Filtering can use the signal from the complex by the need to extract the signal, not part of inhibition
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Size: 307200 |
Author: 12313 |
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Description: 摘要 随着计算机网络深入社会、经济、国防、科技与文教等各个领域, 计算机系统的安全问题正
变得日益复杂和突出. 资源共享和网络分部更增加了网络收到威胁和攻击的可能性, 于是基于包
过滤加状态检测的防火墙系统成为保护网络安全的工具. 文中介绍一种集数据包过滤、日志、代理
服务于一体的复合型防火墙系统, 着重论述利用VC+ + 编程技术实现数据包过滤的软件方法.
关键词 复合型防火墙, 包过滤, 网络安全-summary of the computer network with in-depth social, economic, defense, science and technology and culture, and other fields, Computer system security is becoming increasingly complex and prominent. sharing resources and networks division also increased the network received threats and the possibility of attack, So based on packet filtering plus state inspection firewall protection system has become a tool for network security. This paper introduces a set of data packets filtering, log, agent services in the integration of complex firewall system, focuses on the use of technology to achieve VC data packet filtering software. Keywords composite firewall packet filtering, network security
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Author: qingming |
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Description: Bi-dimensional Gabor filter with DC component compensation
This version of the 2D Gabor filter is basically a bi-dimensional Gaussian function centered at origin (0,0) with variance S modulated by a complex sinusoid with polar frequency (F,W) and phase P described by the following equation:
G(x,y,S,F,W,P)=k*Gaussian(x,y,S)*(Sinusoid(x,y,F,W,P)-DC(F,S,P)),
where:
Gaussian(x,y,S)=exp(-pi*S^2*(x^2+y^2))
Sinusoid(x,y,F,W,P)=exp(j*(2*pi*F*(x*cos(W)+y*sin(W))+P)))
DC(F,S,P)=exp(-pi*(F/S)^2+j*P)
File Id: 13776 Average rating: 0.0
Size: 1 KB # of reviews: 0
Submitted: 2007-01-26 Downloads: 274
Subscribers: 0
Keywords: gabor filter
Stiven Schwanz Dias
-Bi-dimensional Gabor filter with DC compo .. compensation This version of the 2D Gabor f ilter is basically a bi-dimensional Gaussian f unction centered at origin (0, 0) with variance S modulated by a complex sinuso id with polar frequency (F, W) and phase P described by the following equati on : G (x, y, S, F, W, P) = k* Gaussian (x, y, S)* (Sinusoid (x, y, F, W, P)- DC (F, S, P)), where : Gaussian (x, y, S) = exp (-pi* S* 2 ^ (x ^ 2 y ^ 2)) Sinusoid (x, y, F, W, P) = exp (j* (2* pi* F* (x* cos (W) y* sin (W)) P))) D C (F, S, P) = exp (-pi* (F/S) ^ 2* P j) File Id : 13776 Average rating : 0.0 Size :# 1 KB of reviews : 0 Submitted : 2007-01-26 Downloads : 274 Subscribers : 0 Keywords : gabor filter Stiven Schwanz Dias
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Author: 石峰 |
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Description: PDTDFB toolbox
The filter bank is described in:
The Shiftable Complex Directional Pyramid—Part I: Theoretical Aspects
The Shiftable Complex Directional Pyramid—Part II: Implementation and Applications
IEEE transaction on singnal processing, Oct. 2008
Other related papers and software are available at:
nttruong.googlepages.com
Acknowledgement: The code development is based on the matlab code of the contourlet toolbox and the steerable pyramid.-PDTDFB toolboxThe filter bank is described in: The Shiftable Complex Directional Pyramid-Part I: Theoretical Aspects The Shiftable Complex Directional Pyramid-Part II: Implementation and Applications IEEE transaction on singnal processing, Oct. 2008 Other related papers and software are available at: nttruong . googlepages.com Acknowledgement: The code development is based on the matlab code of the contourlet toolbox and the steerable pyramid.
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Author: chan man man |
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Description: To convert ar filter to complex cepstrum -To convert ar filter to complex cepstrum CC
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Author: gaurav |
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Description: 学习扩展卡尔曼滤波气的基本文件，可以随便下载并讨论-This is a tutorial on nonlinear extended Kalman filter (EKF). It uses the standard EKF fomulation to achieve nonlinear state estimation. Inside, it uses the complex step Jacobian to linearize the nonlinear dynamic system. The linearized matrices are then used in the Kalman filter calculation.
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Author: tongliang |
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Description: 基于“粒子”滤波器的复杂环境下头部跟踪算法。-Based on the " particles" of the complex filter tracking algorithm under his head.
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Author: 张继华 |
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Description: This version of the 2D Gabor filter is basically a bi-dimensional Gaussian function centered at origin (0,0) with variance S modulated by a complex sinusoid with polar frequency (F,W) and phase P.-This version of the 2D Gabor filter is basically a bi-dimensional Gaussian function centered at origin (0,0) with variance S modulated by a complex sinusoid with polar frequency (F,W) and phase P.
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Author: rajat singh |
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Description: dsp算法40例,包括fft、滤波器、谱运算等
1． 将模拟滤波器转变为数字滤波器。
2． 由得到幅频响应 。
3． 用Burg算法求AR模型的参数。
4． 由AR模型参数得到功率谱。
5． 用Levinson算法求解Yule-Walker方程以得到 阶AR模型的参数 。
6． 实现双线性Z变换。
7． 设计巴特沃斯模拟低通滤波器，求出转移函数 。
8． 设计切比雪夫I型模拟低通滤波器，求出转移函数 。
9． 直接由定义求 点复序列 的DFT 。
10．利用经典的Cooley-Tukey基2算法求复序列 的DFT 。
-dsp algorithms 40 cases, including the fft, filter, spectrum operations, etc.
1. Analog filters into digital filters.
2. Amplitude-frequency response by obtained.
3. Burg algorithm for AR model with the parameters of demand.
4. AR model parameters obtained from the power spectrum.
5. Levinson algorithm using Yule-Walker equations to get the first-order AR model
parameters.
6. The bilinear Z transform to achieve.
7. Design of Butterworth analog low-pass filter, find the transfer function.
8. Design of Chebyshev-I analog low-pass filter, find the transfer function.
9. Directly from the definition of point complex sequence of DFT.
10. The use of the classic Cooley-Tukey radix-2 algorithm is seeking re-sequence of DFT.
.......
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Author: jack |
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Description: 针对DVB-T标准ETSI EN 300 744 V1.5.1,设计了可用于DVB-T接收整机的多速率DDC模块,并在FPGA中仿真实现.在复用数字振荡混频模块的基础上,根据输入信号的不同带宽(6M/8MHz)选择不同的抽取滤波器组完成抽取因子为3或4的多速率处理任务,利用两级半带滤波器(HBF)级联完成4倍抽取滤波,单级奈奎斯特滤波器完成3倍抽取滤波.-For the DVB-T standard ETSI EN 300 744 V1.5.1, designed for DVB-T receiver machine multi-rate DDC module, and the simulation in the FPGA implementation. Numerical oscillation in the complex mixer module, based on the input signals of different bandwidths (6M/8MHz) choose a different group of complete decimation filter extracted factor 3 or 4 of the multi-rate processing tasks, using two half-band filter (HBF) cascade to complete four times decimation filter, single-stage Chennai Nyquist filter to complete three times the decimation filtering.
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Author: 王楚宏 |
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Description: SAR复数数据转换，RAW格式数据转换，雷达图像滤波，LEE-sigema滤波，Frost滤波，Gamma-MAP滤波，KUAN滤波，雷达图像几何处理，斜距到地距转换程序。-SAR complex data conversion, RAW format, data conversion, radar image filtering, LEE-sigema filter, Frost filter, Gamma-MAP filtering, KUAN filtering, radar image geometry processing, slant range to ground from the conversion process.
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Description: The Mobile Station Modem™ (MSM™ ) MSM7200™ chipset and system software
solution for WCDMA (UMTS)/HSDPA/HSUPA and GSM/GPRS/EDGE networks features
the next-generation technology required to run the world’s most advanced applications
on mobile handsets. From rich multimedia experiences to complex data applications, the
MSM7200 chipset offers the ability to meet the needs of the most savviest wireless users.-The Mobile Station Modem™ (MSM™ ) MSM7200™ chipset and system software
solution for WCDMA (UMTS)/HSDPA/HSUPA and GSM/GPRS/EDGE networks features
the next-generation technology required to run the world’s most advanced applications
on mobile handsets. From rich multimedia experiences to complex data applications, the
MSM7200 chipset offers the ability to meet the needs of the most savviest wireless users.
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Author: oiwehfoiwaefhp |
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Description: 本实验的重点在于把课上学过的理论知识转化为动手实践能力，不仅要理解FIR滤波的原理和数学实现过程，还要学会使用FIR数字滤波，来处理各种复杂的信号和数据。
2).让我们真正的见识了DSP得一些简单功能，尤其是在线仿真ICE的作用，对于今后深入理解ICE的实现过程起到了相得益彰的作用。-The focus of this study is the lessons, hands-the theoretical knowledge into practical ability, not only to understand the principle and mathematical FIR filter implementation process, but also learn to use the FIR digital filter, to handle complex signals and data. 2). Let us have a real knowledge of some simple DSP functions, especially the role of online simulation ICE, ICE for the future in-depth understanding of the implementation process has played a complementary role.
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Author: zhou |
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Description: 基于小波包的带通滤波器设计程序。给出了小波变换的快速算法和重构算法，讨论了应用小波变换进行信号带通滤波的方法，并通过正交小波包对信号的分解，把频率成分复杂的信号分解到各个频带上，根据需要提取指定频率的信号，然后用小波包重构算法对信号进行重构，实现对信号的提取。-Based on wavelet packet band-pass filter design program. Given the fast algorithm of wavelet transform and reconstruction algorithms are discussed using wavelet transform signal band-pass filtering method, and through the wavelet packet to signals can be decomposed, 把 frequency components of complex signal is decomposed into various frequency bands 上, according to need to extract the specified frequency signal, and then reconstructs the signal reconstruction algorithm to achieve the extraction of the signal.
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Author: 王综新 |
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Description: 简单正确的fir滤波器设计与实现，帮助我们更好的设计更复杂的滤波器-Simple and correct fir filter design and implementation, to help us better design more complex filter
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Author: 袁剑 |
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